Cleaner available

Following on from the last post, and being slightly unsure why exactly I bought and then kept a Henry Moore postcard. This was another odd thing to find in the archive box.
I'm realising that a good part of my collection is less about the aesthetic design, or coolness of a piece of print, and more about what it represents and makes me think.
I think I liked the keyword stuffing nature of this tiny flyer. The direct nature and entrepreneurial spirit. Not enough money perhaps to design and print a fancy flyer, but enough smarts to create something clear and photocopy it affordably.
I wonder if they hand wrote this text separately on 8 squares of a piece of A4 paper, then photocopied and and cut? Except, that would create rectangle shapes. How did they end up with squares?
I wonder how successful the campaign was, how much work they got and if they were good?
I wonder if the phone number still works (I'd feel rude to test it), and if it's wrong of me to post it randomly online. Hang on, does GDPR relate to data that was posted though my door over a decade ago and that I've been storing?! No, but it's a thought toward how we should respect each others information.
I wonder also, very slightly, and with my cynical hat on (which I remember wearing when I first saw and collected this), if this is not actually made by a single individual entrepreneurial cleaner, but is instead produced by a larger operation. A setup which knows that people respond better to unsolicited post when it uses the friendly graphic languages of handmade and handwritten?
Maybe I should just call and find out.